By the end of Lich King, nearly all the major mechanics that Blizzard introduced during the course of WOW evolution had come into play: Badges, the dungeon finder, dailies, reputation hubs, tier acceleration, split difficulties, split raid sizes, profession currencies, separate pvp/pve tracks, achievements, and more…

In many ways, The Burning Crusade was my favorite endgame. Not only was it fun (and hard), but it was a time of heavy design experimentation where the Fel Reaver’s share of new gameplay ideas were introduced…